(2020.3.18已解决)Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker dae

• docker run hello-world

  运行docker run hello-world出现如下错误：

  Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?

  此处给出解决方案：

  sudo systemctl start docker
  

  结果出现如下错误：

  System has not been booted with systemd as init system (PID 1). Can't operate.

  此处给出解决方案：

  sudo /etc/init.d/docker start
  

  因为在WSL 2中没有systemd

  运行上述命令，出现 \* Starting Docker: docker